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T. 1)., HOLLIC-K & E. RICKARIDIv APPARATUS-F011 THE TRANSMISSION OF POWER. N0.'3=81;138. PatentedApp.17;188.

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I 2 Sheets- 811061; -T.' D. vHOLLICK & W. E. RIC-KARD. v APPARATUS FOR THE TRANSMISSION OF POWER.

' (No Model.) I

- PatentedApn 17. 1883. y

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' UNIT D; STATES PATENT THOMAS DRAKE HOLLIGK AND/WILLIAM EDWARD RIOKABD, OF'LONDON,

' coUN rY or MIDDLESEX, ENGLAND.

APPARATUSFO R TH E- TRANSMISSION OF PowER.

SPECIFICATION forming pillt Letters Patent NO. 381 ,1 38, dated April 17, 188 8;

' Application filed August 8,1887. Serial No. 246,380. (No model.) v

To all whom it may concern:

Be it known thatwe, THOMAS DRAKE HoL- L IOK and WILLIAM EDWARD RIOKARD, eng neers, subjectsjof the Queen of Great Britam, resldinginiLondon, in the county of Middlesex, England, have invented certain new and useful Improvementsin Apparatusfor the Transmission of Power; andwe do hereby dc:

' clare the following to be a full, clear,- and'exact description of the invention, reference being had to the accompanying drawings,which form part of this specification.

Our invention relates to improvements 'in machinery or apparatus for transmitting power from a driving-shaft revolving at a greater speed to another shaft which is to be driven at a reduced speed-as for instance, from the shaft of an electric motor to the driving-axle of atram-carriage which it is desired topropel by such electric motor.

The objects of our improvements are to pro vide means by which the driving-shaft and the driven shaft or axle are readily connected to-v gether, so that the relative speed of thelatter may be capable of easy and rapid variationand its direction of movement reversed or its 7 revolution stopped without any interference with the movement of the driving-shaft. .We attain these objects by means of mechanism] illustrated in the accompanying drawings, in

Figure 1 is a vertical transverse section -through a driving;shaft and through a paral- -1e1 shaft which is to be driven by it. Fig; 2 is driven shaft when required without interferingwith the driving-shaft or motor.

Similarletters refer to similar parts throughout the several views.

a is the driving-shaft of an electric or other motor, revolving continuously in either direction and at a high speed in suitable bear the center thanat theends, as shown, into cess becomes jammed between the edge of the ring -t and the steellpiece w, which forms the outer side of the recess, as indicated in Fig. 4.

ings, b, and c is the shaft (for instance, the

driving-axle of a tram-car) which is to be driven at a reduced speed and its speedflvav ried, as desired, or its rotation reversed or stopped, as desired; "without, interfering with the driving-shaft a. I g The driving-shaft a is provided with a crank, d, or'eccentric or other equivalent device, by

which a short reciprocating movement back- 1 ward and forward is given to, the connecting 3+ rod e,the other end of which is forked and 6 0 I jointed to pins f fupon vertical bars 9 g, which are provided at their lower ends with-pins h h, upon which the bars g y, when theishaftua revolves, oscillate, their upper ends being coni nected and stayed by the bolt and stayi. The

bars 9 g fit in corresponding vertical grooves.

in the block is, the center of :'which is cylindrical and turns freely in a correspondin'g eye, Z, inthe connecting-rod m, (shown separately in Fig-. 2f,) one.end of which is jointed atn to a radius rod, 0, t-urningupon afiXed center, 10,

so that the'point n is compelled to move in a path approaching a horizontal line. The other end of the connecting-rod m is jointed at 3 to the strong ring or'hoop 8, which fits freely upon the ring 25, formedor fixed upon the shaft or axle c which is to-bedriven. The ring sis provided inits inner circumference with'one or more recesses, u, of slightly greater height at which is introduced a roller orfriction piece,

in Fig. 1, is free, buti near the ends of the re- If, therefore, the roller' c be forced toward" either end of the recess or, while the ring or hoop s is made to oscillate backward and forr' ward upon the ringtby the connecting rodm,

grip the roller -v between the ring 8 and thering t, and will cause the latter, together with the shaft 12, to turn-round with it, while in the other direction the roller will be released andthe ring s will move back freely. The ring t and shaft a will. therefore receive'a succession of short the movement of the latter in one direction will I impulses in the same direction and willre volve in that direction. If the roller ,2) be eating movement is transmitted to the ring 8 'forced toward the other end of the recessu instead of the one just described, it will be gripped against the ring 17 during the backstroke of the ring 8 instead of its forward one, and the direction of rotation of the shaft 0 will be reversed, while if the roller 12 be kept in the central wider part of the recess it will not grip the ring it, and the latter, with the shaft c,will cease to be rotated in either direction, but is quite disconnected from the driving devices and can revolve perfectly freely.

In order to vary the stroke of the connecting-rod m, and consequently the speed of rotation in either direction of the shaft 0, the joints h h, upon which the vertical bars g g turn, are raised or lowered, as desired, the bearings which carry them moving vertically in guides or being carried at the end of an adjustable lever.

If the joints h h be raised until they are concentric with the center of the block k,the connecting-rod m will evidently cease to oscillate, while if they are lowered until the pins f f are concentric with the block In the latter and the connecting-rod m will have a stroke equal to that of the connecting-rod e, and at any intermediate point the stroke of the connectingrod m will be varied as may be desired.

In'order to adjust the position of the roller 1) in the recess a for the purpose of starting, reversing, or stopping the shaft 0, it is provided with pivots at its ends turning in holes or bearings in plates a: w,which fit freely upon the axle 0 upon each side of the ring t, as shown in Figs. 4, 5, and 6. The plates w w are provided with arms 3 3 which are connected below by a eonnecting-rod,z,to a lever, A, which turns upon a center, B, carried by the oscillating ring 8. By moving the handle 0 of the lever A in either direction .which can be readily done even when they are very rapidly oscillating backward and forward, the roller 22 can be brought toward either end of the recess u, the shaft 0 being caused to revolve in the corresponding direction, or it can be retained at the center of the recess, as shown in Fig. 4, and the transmission of motion to the shaft 0 then ceases.

The. lower end of the lever A' may be made somewhat flexible and elastic, and instead of the handle being formed upon the lever it may be arranged at any distance and connected to the lever by a connecting-rod, as shown in dotted lines in Fig.4.

If it should not be required that the speed of rotation of the shaft 0 should be varied,but only that it should be'started, stopped, or reversed when required, the connecting-rod 6 may be jointed directly to the ring 8, as shown in dotted lines in Fig. 1, the bars 9 9, block k, and connecting-rod m being omitted.

When the motorshaft a is set in rapid rotation in either direction, it communicates a reciprocating movement to the connecting-rod e by means of the crank d, and this reciproby means of the bars 9 g and the connectingrod 110.

The reciprocating movementof the ring 8 1S converted into an intermittent rotating movement of the shaft 0 by means of the roller 1) and the curved recess u in the ring 3, the di-. rection of such rotating movement being determined by the position of the roller v near one or other end of the recess u.

Where the shaft 0 is provided with a flywheel or sets in movement a heavy weightsuch, for instance, as a tram-car-its intermittent rotating movement becomes continuous, and to insure such continuous movement it is evident that two or more rings, t, and rings 8 may be used, actuated by a corresponding number of cranks, d, set at equal distances round the motor-shaft a. i

In order to vary the speed of the shaft 0 without altering that of the motor-shaft a,the

center h is raised or lowered, the length of reciprocating movement of the ring s being lessened or increased, as already described; and in order to reverse the direction of rotation of the shaft 0 without interfering with that of the motor-shaft a the roller '0 may be made to approximate to one or other end,as desired, of the recess a by means of the plates a: as, carrying the ends of the roller o,and the lever A, connecting-rod z, and handle 0, as herein before described.

Our invention is applicable to various pur-- poses-as, for instance, the transmission and regulation of power for driving cranes by electrio motors, steam, or other means, or, as already mentioned, for driving tram-cars by electromotors. The machinery to be driven may be connected to the shaft 0 by beveled or other toothed gear, or by pulleys and belts, if advisable.

We are aware that the use of a disk surrounded by a ring having a tapering recess containing a friction-piece, by which rotary motion is communicated to the disk by the reciprocating movement of the ring, is not new, but has already been used in what is known as silent-feed mechanism; but

What we claim as our invention, and desire to secure by Letters Patent, is-

1. The combination of the reciprocating connecting-rod 6 with the ring 8, having recess u, tapering at both ends, the roller 1; in said recess, the ring t, the shaft 0, the plates as a, which carry the journals of said-roller, the connecting-rod z, and thelever A, substantially as set forth. i

2. The combination of the reciprocating connecting-rod e with the ring 8, having recess u, tapering at both ends, the roller 1) in said recess, the ring it within said ring 8, the shaft 0, and the plates as x, in which said roller is journaled, the rocking of said plates in one direction or the other determining the position of said roller and the direction of rotation of shaft 0, substantially as set forth.

381,138 a t I ya on which said bars turn, in combination with witnesses.

a shaft, Q, and interveningconne'gtions for r 5 transmitting motion, said -block being jour-fl V THOMAS DRAKE HOLLIGK.

naled in connecting-rod m, andsaid bars 99 WILLIAM EDWARD RIOKARD," being adapted to be raised or lowered in -ret cesses of said trunnion to regulate the amount Witnesses:-

of motion transmitted, substantially as set l EDMUND EDWARDS, v

10 forth. I ARTHUR E. EDWARDS.-

3. The connecting-rods e and m, the block In witness whereof we have hereunto signed a k, and the verticalbarsgg, having the pins hh, our names in the presence of two subscribing A 7 

